error: unknown target triple 'bpf', please use -triple or -arch

[gpt8763]

[root@VM-16-11-centos coolbpf]# ./install.sh -arch
Found libelf library: /usr/lib64/libelf.so
-- ARCH: x86
-- Found bpftool: /usr/sbin/bpftool
-- Found clang: /usr/bin/clang
-- Archicture: x86_64
-- Include Directories: -I/root/coolbpf/third;-I/root/coolbpf/arch/x86_64;-I/root/coolbpf/third/libbpf/include;-I/root/coolbpf/third/libbpf/include/uapi
-- Configuring done
-- Generating done
-- Build files have been written to: /root/coolbpf/build
[ 2%] Generating BPF object: /root/coolbpf/build/src/bpf/net.bpf.o
error: unknown target triple 'bpf', please use -triple or -arch
make[2]: *** [src/bpf/net.bpf.o] Error 1
make[1]: *** [src/bpf/CMakeFiles/net_skel.dir/all] Error 2
make: *** [all] Error 2